Optimal performance for your evaporative cooler is easy with this replacement media pad set. Its durable construction utilizes MasterCool’s premium CELdek media. It ensures a perfect fit due to its unique and multi-layered design. Each set comes with 1 center pad and 2 side pads. MasterCool is a registered trademark of Champion Cooler Corporation. WARNING: This product can expose you to chemicals including benzene which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.